Wednesday, July 2, 2014

F4H-1 Intake Splitter Plates

After sharing a copy of my latest drawings with a few selected friends, I was told that the intake profile and splitter plates looked wrong.  They were kind enough to share a few pictures and sure enough, I missed the mark.  So I took the opportunity to research the situation a bit more and redesign my drawings (this time digitizing the contours directly from the pictures).

Here is the result of my research (ignore the paint job, they are all on the same master aircraft drawing):

As seen on BuNo.142259a - plain splitter plate:


 As seen on BuNo. 143389a - pass through holes added to variable ramp section:


As seen on BuNo. 142260a - Intake was cut back and lower discharge chute added (upper scab was primarily to make up height difference between old variable ramp and new intake profile, but also may have served as a discharge chute):


As seen on BuNo. 145315b - holes added to discharge chutes:


As seen on BuNo. 145312b  - expanded upper discharge chute:


As seen on BuNo. 145307b - Holes added to expanded upper discharge chute:


Finally, starting with BuNo. 146817c - Production intake and splitter plate (larger splitter plate, smaller variable ramp, top discharge chute was smaller, intake has new profile):


As always, comments are welcome.

Revision History:
  •  02 JULY 2014 - Original Post
Sources:
  • Artwork by Kim Simmelink
  • Craig Kaston and his never ending supply of information
  • Tommy Thomason and his wisdom
  • Pictures found on the internet and in my collection


Friday, May 30, 2014

All You Ever Wanted To Know About The J79 Turbojet Engine

YouTubes made by AgentJayZ of S&S Turbines about the J-79 engine. I find them a wealth of information and good clean fun. Just click on the titles to watch the videos.  This guy has a dream job! I miss the smell of burned JP-4.

J79 – Turbine Engines: A Closer Look
J79 Main Coupling
Inside an Afterburner
Max Power, Plus Afterburner – LOUD!
Afterburner In Your Face
Testing A Starfighter Engine
J79 in Reheat: More!
Afterburner Fuel System
J79 Nozzle Test
Afterburner Spark Test
Testing a GE J79 with Afterburner
Turbine Engine: Flight vs Industrial
The Afterburner

Revision History:
  •  30 MAY 2014 - Original Post
Sources:
  • YouTube: https://www.youtube.com/user/AgentJayZ

Tuesday, May 13, 2014

Differences between the Phantom FG.1 and FGR.2

The model F-4M (FGR.2) was an adaptation of the F-4J and F-4K (FG.1) aircraft.  The structure forward of FS 77 is based on the F-4J with the remainder of the aircraft the same as the F-4K (FG.1) with a few exceptions. These exceptions include:

  • The F-4K nose gear was replaced with a modified F-4B nose gear.
  • All carrier suitability provisions have been removed on the F-4M.
  • Local structural changes were made throughout the aircraft for new equipment.
  • The vertical tail was similar to the RF-4C. The primary difference between the F-4K and the F-4M was the addition of a leading edge HF antenna in the F-4M vertical tail.
The structural changes would include local beef up for the installation of strike cameras, removal of the pressure activated flooding doors for the foward and aft cockpits, modification of center fuselage bulkheads to provide for cooling air and new wiring harnesses to the enlarged aft equipment bay, and changes to the location of the stabilator feel trim equipment to allow for the enlarged aft equipment bay.


Top Fin Cap Differences:


Phantom FG.1 (F-4K) Development:

1 - Prototype YF-4K had the standard F-4 fin cap
2 - Production aircraft had the white nav light moved to just above the rudder
3 - Retrofit fairing for the Marconi ARI 18228 Radar Warning Receiver

Phantom FGR.2 (F-4M) Development:

1 - Prototype YF-4M had the standard F-4 fin cap
2 - Production aircraft had the white nav light moved to just above the rudder
3 - Retrofit fairing for the Marconi ARI 18228 Radar Warning Receiver


Aft Fuselage Differences:

Phantom FG.1 (F-4K) - Left Side
1 - Standard F-4 drag chute door which changed to modified version (depicted below) with installation of the RWR fin cap
2 - See previous section for fin cap differences
3 - Standard F-4 vertical tail
4 - Standard F-4 fuselage panel configuration 

Phantom FGR.2 (F-4M) - Left Side
1 - Drag chute door was modified with nav light after installation of RWR fin cap
2 - See previous section for fin cap differences
3 - The FGR.2 used the same vertical tail as the RF-4C with the large vertical antenna in the forward portion of the tail
4 - The FGR.2 had an enlarged door 61L

Phantom FG.1 (F-4K) - Right Side
1 - Standard F-4 drag chute door which changed to modified version (depicted below) with installation of the RWR fin cap
2 - See previous section for fin cap differences
3 - Standard F-4 vertical tail
4 - Standard F-4 fuselage panel configuration with standard position for door 62

Phantom FGR.2 (F-4M) - Right Side
1 - Drag chute door was modified with nav light after installation of RWR fin cap
2 - See previous section for fin cap differences
3 - The FGR.2 used the same vertical tail as the RF-4s with the large vertical antenna in the forward portion of the tail
4 - The FGR.2 had a new door 61R with a much higher placement and modified shape of door 62 for tail hook servicing


Revision History:
  •  13 MAY 2014 - Original Post
Sources:
  • Artwork by Kim Simmelink
  • Craig Kaston and his never ending supply of information
  • Michael France and his pictures of XV474 at Duxford Museum
  • Pictures found on the internet